Feed water heater



July 7, 1931. s. o. A. FIEDLER 1,813,041

FEED WATER HEATER Filed Aug. 2. 1929 Patented July 7, 1931 f UNITED STATES PATENT lOFFICE l SEBASTIEN (`)T TO ALFEED FIEDLER, OF PARIS, FRANCE, ASSIGNOR T LAUXILIAVIRE A DES CHEMINS FER ET LINDUSTRIE, OF PARIS, FRANCE FEED WATER HEATER Application filed August 2, 1929, Serial No. 383,080, and in France April 12, 1929.

' The invention relates to feed water heaters and more particularly to the means for returning to the suction side of the water circulating pump, injector, or the like, which is adapted to supply the feed 4water heater with water to be heated, any excess of hot water which is not taken up by the pump or injector which is adapied to feed the boiler.

,The invention has chiefly for its object to simplify the construction of theI plant; another object is to provide improved means for returningsaid excess of hot water to the circulating pump or the like; a further object is to devise an arrangement which will eficiently prevent -failing of the circulating pump or the like.

In my co-pending application No. 295,724, filed July 27, 1928, I have described an arrangement, wherein the excess of hot water is delivered into a receptacle open to the atmosphere, whence it is returned to the suction side of the pump or injector which supplies the mixing chamber, and said receptacle is located at a higher-level than the suction vessel mounted on the admission pipe of the circulating pump.

It has been found that the plant may sometimes be simplified by dispensing with the receptacle open to the atmosphere and dev' livering directly the excess of hot water from the heater into the suction vessel of the suction pipe of the cold water pump, said suction vessel being now provided with a vent p l'lhese improvements are illustrated in the accompanying drawings, wherein:

Fig. 1 is a diagrammatic view showing a feed water heating plant according to the invention.

Fig. 2 is a cross-section of the pressure bal- Y anced valve shown diagrammatically in Fio'. 1.

'The feed water heating plant shown in Fig. 1 comprises a feed water heater embodying a mixing chamber 20 and a hot water distribution chamber 21, connected together'by a water seal 25. Mixing chamber 20 has a heating steam inlet conduit 22 and a perfo` rated tube 23 for the inlet of water to be heated.Y Water and steam are mixed together and forced by steam pressure into chamber 21 through the water seal 25. Chambers 2O and 21 are substantially sealed, although they are provided with very small gas exhaust orices 32, 33, and the water seal is so arranged that the weight of the water column therein is readily overcome by the steam pressurel in chamber 20, whereby said joint is almost always blown off, chamber 20 being substantially constantly emptied of water.

Chamber 2l has several partitions forming weirs, whereby the gases dissolved inthe water are readily disengaged and escape through orifice 33, through which the loss of steam is negligible. Orifice 32 is used similarly for the exit of the gases disengaged from the Water in mixing chamber 20'. The abovednentioned partitions bound 'a storage compartment 90 and an overow compartment 29.

Into the bottom of the overiiow compartment 29 of the distribution chamber 21 opens a hot water discharge tube 2 having atl its lower part a small cylinder 4 in which is movable a piston valve 5 of suitable weight. On the side of said cylinder opens a pipe 6 affording communication between said cylinder and a suction vessel 70, open to the at-mosphere through a vent pipe 80 of suitable height. At the upper part of cylinder 4 opens a tube 3a connected with chamber 21 at a point situated above the maximum level of thel water therein. Suction vessel 70 isconnected by a pipe 71 with the source of cold water (not shown) and by a pipe 31 to the' suction side of a pump 24 discharging through a pipe 5a and tube 23 into chamber 20. The bottom of storage rcompartment 90 is connected by a pipe 26 to the suction side of a pump 27 forcing hot water into the boiler (not shown) through a pipe 100;

Piston valve 5`operates as follows: When water collects in compartment 29 of chamber 21, piston valve 5 is raised to allow the discharge of said water, under the pressure of the steam in chamber'21, into suctionvessel 70. n "hen discharge tube 2 is emptied ofI water, or nearly so, piston valve 5 is again,y

lowered, thus preventing the escape of steam` 100 to the atmosphere.

- FigiQ shows the details-oi` construotion of cylinder 4, Whose openings 72,` 73', 74 are r'espectively connected With pipes 3a, 6l and 2. Piston valve 5 is slidably mounted in aman-v tle 77. A smalldraining orice 63 (of 3 'mile lmbters. diameter for examnlelbfoids bb@ exit the 'bndenaat nib b1' fbi..ibf nine" 3 and Whose Weight vvWould troub e the p oper operation of valve 5. The loss of"'ist'elan1'Y .lothroughzsaidorieeisnegligble;

' It has beennbservedi that; Withfa. redueedf` f pressure in chamber 21, impure WaterY from pipe 7l leaksbetween Valve 5 andf'oyli-iiden l '4i and proceedsl aboye the piston, due tothe static head o-said Water. VThe impure' Water ebeatdfwben .Chamber 21.. and. npes? are lied; with. Vs.tf .e.s.i 1o;1,, tbusgleaifng. a fwbbblV bends; t .blogg-un the Patentes, n jl' AV ho ,Water feeding j aritangeinent' fon bb er PiiSDga'selifebtcbld.Weten a feed wat@ bbitbrmns for. bunnlyibglbaibb i i th heating steam, Coldwaten supleans i012 @implying .Saicbbeater with from. Sadgsburce-.O Cbld Weberfbbln tali@ .2E-Said, nieariss-with-theOutlet *t .d beater; ovbeow.Cfzmnaitlnentfn Said beat@ ne'. .1.1g-sa1d'f-ovb intake bf Said Steamftrap leben.;

mme and@ tent pipe. bf; Suitable height mening intQ-Sablfwaterf dsbba-nge meenemen "sadstbam Lemmens.;

.A .heb Water@ feeding ariangement fon boilers Compnillgfa .Sqnrbe'gqf boldfwater,

' @i feed rwatenbeater I@20.11.119.ri.Singa .Substani said, sour-@ebb @bld watls. a substantially.

i weten dsbbargbf y adapted to beoveroome by the pressure of` the heating steam, whereby Water and steam are caused to flow romsaid mixingohamber ,-into said distributingohamber, saidmixing chamber containing substantially no Water,

la. sterbe@ Qbmparitmentn. said'. distributing 'ohfamberiadapgtedto reoeifjve the' watten from said miingbliamber, boiler feeding'means,

vmeans for connecting the intake of said feeding-fmeans with the 'out-let; 'offs said'stonage compartmenu. an overflow: compartment in said distributing chamberadapted to receive theoverfiotv 'from said storage compartment,

Water; dischargb. means for @bisecting Said i overflow oompartinentwitii thei-ntake of said @Old Water Supplying .means .Stews bmp meansin said Water4 discharge nie'angand a.

lbllb is and.: @Leibes-bambine .by-Letters f Sbbamroldiwaterf Supplying means. for-snp-r y filbbbd" .dStbbutiQn-.Chamber, hydraulic jointbetween*said-Chambers.the.weight-.toit Y" the Water Column formingsaillrjgjnybeing: 

